{"id":"CVE-2026-23121","revision":"7e807fcc486142c1a8796d74eb3cd272","records":[{"revision":"7e807fcc486142c1a8796d74eb3cd272","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-23121","aliases":[],"title":"mISDN: annotate data-race around dev->work","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nmISDN: annotate data-race around dev->work\n\ndev->work can re read locklessly in mISDN_read()\nand mISDN_poll(). Add READ_ONCE()/WRITE_ONCE() annotations.\n\nBUG: KCSAN: data-race in mISDN_ioctl / mISDN_read\n\nwrite to 0xffff88812d848280 of 4 bytes by task 10864 on cpu 1:\n misdn_add_timer drivers/isdn/mISDN/timerdev.c:175 [inline]\n mISDN_ioctl+0x2fb/0x550 drivers/isdn/mISDN/timerdev.c:233\n vfs_ioctl fs/ioctl.c:51 [inline]\n __do_sys_ioctl fs/ioctl.c:597 [inline]\n __se_sys_ioctl+0xce/0x140 fs/ioctl.c:583\n __x64_sys_ioctl+0x43/0x50 fs/ioctl.c:583\n x64_sys_call+0x14b0/0x3000 arch/x86/include/generated/asm/syscalls_64.h:17\n do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]\n do_syscall_64+0xd8/0x2c0 arch/x86/entry/syscall_64.c:94\n entry_SYSCALL_64_after_hwframe+0x77/0x7f\n\nread to 0xffff88812d848280 of 4 bytes by task 10857 on cpu 0:\n mISDN_read+0x1f2/0x470 drivers/isdn/mISDN/timerdev.c:112\n do_loop_readv_writev fs/read_write.c:847 [inline]\n vfs_readv+0x3fb/0x690 fs/read_write.c:1020\n do_readv+0xe7/0x210 fs/read_write.c:1080\n __do_sys_readv fs/read_write.c:1165 [inline]\n __se_sys_readv fs/read_write.c:1162 [inline]\n __x64_sys_readv+0x45/0x50 fs/read_write.c:1162\n x64_sys_call+0x2831/0x3000 arch/x86/include/generated/asm/syscalls_64.h:20\n do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]\n do_syscall_64+0xd8/0x2c0 arch/x86/entry/syscall_64.c:94\n entry_SYSCALL_64_after_hwframe+0x77/0x7f\n\nvalue changed: 0x00000000 -> 0x00000001","state":0,"publishedAt":"2026-02-14T15:09:51.912+00:00","modifiedAt":"2026-10-19T18:25:32.103+00:00","affected":[{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n \"product\": \"Linux\",\n \"vendor\": \"Linux\",\n \"defaultStatus\": \"unaffected\",\n \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n \"programFiles\": [\n \"drivers/isdn/mISDN/timerdev.c\"\n ],\n \"versions\": [\n {\n \"version\": \"1b2b03f8e514e4f68e293846ba511a948b80243c\",\n \"lessThan\": \"d5d99cb9e0839093cd53aa3b28176fce2f820ca0\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"1b2b03f8e514e4f68e293846ba511a948b80243c\",\n \"lessThan\": \"13f3b3b87068898056db4c79ee67052fbde11d43\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"1b2b03f8e514e4f68e293846ba511a948b80243c\",\n \"lessThan\": \"accc3f8266d2a49881dbcf78c459477f4efa0ff3\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"1b2b03f8e514e4f68e293846ba511a948b80243c\",\n \"lessThan\": \"fc8ba17fd3337bd8b1913c30b95df0fee00d8fb7\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"1b2b03f8e514e4f68e293846ba511a948b80243c\",\n \"lessThan\": \"aa6e33cd74ca4965f2bbcb025e0b672fb0168a69\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"1b2b03f8e514e4f68e293846ba511a948b80243c\",\n \"lessThan\": \"7ac345a93af31358e18e9606eb7b354691bf6757\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"1b2b03f8e514e4f68e293846ba511a948b80243c\",\n \"lessThan\": \"8175dbf174d487afab81e936a862a8d9b8a1ccb6\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n }\n ]\n }"},{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n \"product\": \"Linux\",\n \"vendor\": \"Linux\",\n \"defaultStatus\": \"affected\",\n \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n \"programFiles\": [\n \"drivers/isdn/mISDN/timerdev.c\"\n ],\n \"versions\": [\n {\n \"version\": \"2.6.27\",\n \"status\": \"affected\"\n },\n {\n \"version\": \"0\",\n \"lessThan\": \"2.6.27\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"5.10.249\",\n \"lessThanOrEqual\": \"5.10.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"5.15.199\",\n \"lessThanOrEqual\": \"5.15.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.1.162\",\n \"lessThanOrEqual\": \"6.1.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.6.122\",\n \"lessThanOrEqual\": \"6.6.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.12.68\",\n \"lessThanOrEqual\": \"6.12.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.18.8\",\n \"lessThanOrEqual\": \"6.18.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.19\",\n \"lessThanOrEqual\": \"*\",\n \"status\": \"unaffected\",\n \"versionType\": \"original_commit_for_fix\"\n }\n ]\n }"}],"metrics":[],"references":["https://git.kernel.org/stable/c/d5d99cb9e0839093cd53aa3b28176fce2f820ca0","https://git.kernel.org/stable/c/13f3b3b87068898056db4c79ee67052fbde11d43","https://git.kernel.org/stable/c/accc3f8266d2a49881dbcf78c459477f4efa0ff3","https://git.kernel.org/stable/c/fc8ba17fd3337bd8b1913c30b95df0fee00d8fb7","https://git.kernel.org/stable/c/aa6e33cd74ca4965f2bbcb025e0b672fb0168a69","https://git.kernel.org/stable/c/7ac345a93af31358e18e9606eb7b354691bf6757","https://git.kernel.org/stable/c/8175dbf174d487afab81e936a862a8d9b8a1ccb6"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-23121","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-23121","identifiers":["CVE-2026-23121"]},"retained":false,"historicalAffected":[]}],"coverage":[]}